Safety device for stoves



y 6, 1931. w. ELLMAN 1,807,310

SAFETY DEVICE FOR STOVES Filed July 6, 1929 2 Sheets-Sheet l I 2% a5 Z J E \g h ATTORNEY May 26, 1931. 1 w. ELLMAN 1,807,310

SAFETY DEVICE FOR STOVES Filed July 6, 1929 2 Sheets-Sheet 2 ATTQRNEY Patented May 26, 1931 Uhli'i' STATES ATENT OFFICE mum w WOLFGANG ELLMAN, F SHE BOYGAN, WISCONSIN SAFETY DEVICE FOR STOVES Application filed July 6,

be automatically closed when the burner is extinguished, so that should the valve be accidentally opened, or the burner flame accidentally extinguished with the valve in open position, the gas will be automatically shut Off Another object of the invent-ion is the provision of a device of the above character which may be positioned for use with the op erating parts supported by a bracket of novel construction, so that the device may be cheap- 1y made, readily installed, and may operate a in a reliable and efficient manner.

With the above and other objects in View, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings Figure 1 is a fragmentary plan view showing the burner and controlling valve of a stove with the invention in position for use, the parts being shown by full lines in position when the burner is lighted, while the dotted line position shows the parts as arranged. when the burner is extinguished.

Figure 2 is a side edge view of the device per se.

Figure 3 is a rear edge view.

Figure 4 is an edge view of the bracket looking at the edge opposite that shown in Figure 2.

Figure 5 is a detail perspective view of the bracket.

Referring to the drawings in detail where in like characters of reference denote corresponding parts, the reference character indicates a burner such as may be commonly used for gas stoves, while 11 indicates the valve for controlling the supply of gas to the burner, the latter being fed to the burner through the burner supply pipe 12. 13 indicates the handle of the valve, while 14; indicates the pipe through which gas is supplied to the valve 11.

1929. Serial No. 376,466. g

. The present invention contemplates the provision of means for automatically closing the valve 11 in the event that the latter is accidentally opened when the flame of the burner is extinguished, and for automatically closing the valve in the event that the flame is accidentally extinguished with the valve in open position. For this purpose, the invention comprises a substantially Lshaped bracket which includes a plate or body 15. i

' One arm ofthis body is provided with spaced openings for the passa 'e of bolts 16 for the attachment of a yoke 1(, by means of which the plate or body is secured to the burner supply pipe 12.

The bracket is formed from a single piece of material and for this purpose, the plate or body has extending therefrom spaced parallel cars 18 and '19. These ears are bent from the edge of the plate and are provided with axially aligned openings which slidingly receive a rod 20. Bent upward from the opposite edge of the plate 15 are spaced ears 21 and 22. The ear 21 is transversely spaced from an car 23 which extends upward over the other edge of the plate and over which the car 19 extends. The ears 21 and 22 are provided with radially aligned openings which slidingly receive a bolt or trigger 24.

The bolt or trigger 24 is thus disposed at right angles to the rod and the latter is provided with a circumferential notch 25 which is adapted to receive a tongue 26 extending from the outer end of the trigger 24. The inner end of the trigger 24 is loosely connected with one end of a thermostatic strip 27, the opposite end of this strip being connected to one end of a threaded stud 28.

This stud extends through an opening provided in the car '22 and has threadedly mounted thereon upon opposite sides of this car, adjusting nuts 29 and 30.

By reference to Figure 1 of the drawings it will be seen that the strip 27 is arranged adjacent the burner 10 so as to be acted upon by the heat supplied by the flame of the burner. The position of this strip with respect to the flame may be adjusted through the nuts 29 and 30.

The rod 20 has mounteclupon its inner end a coiled spring 31 which bears against the ear l9 and against a washer 32 which is held upon the rod by means of a nut 33. This nut is threadedly mounted upon the rod and may be adjusted to adjust the tension of the spring 31.

The opposite end of the rod 20 has secured thereto one end of a wire 34 and the opposite end of this wire is secured to the handle 13 of the valve 11 as shown at 35.

Normally, the parts are positioned as shown by the dotted lines in Figure 1 of the drawings. When the valve 11 is opened, the parts will be positioned as shown by the full lines in said figure with the trigger 24 engaging within the groove 25 of the rod 20, the strip 27 being flexed by the heat from the burner. As soon as the burner is extinguished, the strip 27 will cool so that it will return to its normal straight position, whereupon the trigger will be moved to release the rod 20 and the latter will move under the action of the spring 31 to close the valve 11.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claim.

Having described the invention what is claimed is In combination, a stove burner having a supply pipe extending therefrom and a burner valve in said pipe, said valve being provided with a handle, a substantially L-shaped plate formed from a single piece of metal and comprising a flat body adapted to have one end secured to the burner supply pipe, spaced parallel ears extending from one edge of the body and having axially aligned openings therein, spaced apertured ears extending upward from the other edge of the body, and an apertured 'ear extending upward from the first referred to edge in transverse axial alignment with one of the spaced apertured ears mentioned, a rod slidable in the open ings of the spaced parallel ears, a spring to yieldingly resist movement of the rod in one direction, means connecting the rod with the valve handle to move the rod against the ac tion of the spring when the valve is opened, means slidable through the transversely aligned apertured ears to engage the rod, and thermostatic means carried by one of the spaced apertured ears and engaging the rod engaging means to control the operation of the latter.

In testimony whereof I afiix my signature.

WVOLFGANG ELLMAN. 

